A cgbpobation



A ug. 6, 1929..

F. E. BERTRAND DRILLIIJG MECHANISM FOR WOOD HEEL ATTACHING MACHINES Filed Sept. 2, 1925 2 Sheets-Sheet 1 Figi.

Aug. 6, 1929. F. E. BERTRAND DRILLING MECHANISM FOR WOOD HEEL ATTACHING MACHINES Filed sept. 2, 1925 ZSneetS-Sneer 2 but.:

PAUL om .1

Patented Aug. 6, 1929.

UNITED STATES ?TENT OFFICE.

FREDERIC E. BERTRAND, OF LYNN, MASSACHUSETTS, ASSIGE'OR TD UNITED SHOE MACHINERY CORPORATION, 0F PATERSGN, NEW' JERSEY, A

JERSEY.

RQBATION F NEW DRILLING MECHANISM F033l VOOD-HEEL-ATTACHNG MACHINES.

Application filed September This invention. relates to apparatus for use in attaching heels to shoes and is herein illustrated as embodied in a machine particularly adapted for carrying out the method of wood heel attaching disclosed in United States application Serial No. 367,173, filed March 19, 1920, in the name of M. V. Bresnahan, although in various aspects the invention is not limited to embodiment in a machine of that type or to use in practicing that niethod.

A machine for practicing the ahove-mentioned method is disclosed in United States Letters Patent No. 1,502,0l1l, granted July 22, 192e, en my application. The machine j ust referred to comprises a clamping` device for supporting` a shoe mounted upon a perforated last and for holding a wood heel in assembled relation with the shoe 5 and a powerdriven drill at the end of a flexible shaft for operating` through the perforation in the last to bore a hole through the heel seat portion of the shoe bottoni and into the heel to receive a screw fastener which is to hold the heel in place during the drying of the heel attaching cement.

@ne object of the present invention is to provide, without sacrifice of other utilities, an improved apparatus of the type just re`- ferred to. This objc-ct has been attained by the provision of a novel organization coinprisi of a rigid drill shaft and universal joint connections between the drill shaftand the motor which suppii the drivingT power. As illustrated, the drill shaft is made in two sections arranged to telescope one within the other so that the shaft may be extended or contracted will, as may be required in the use of the drill. The provision of universal joint connections between the drill shaft and the motor enables the drill shaft to be swung' hodily away from the operator so that the drill may he supported in an outofthe-way position when it is not in use. The use of an extensible drill shaft composed of solid telescoping` sections, in combination with a universal joint connection between the drill shaft and the motor, provides a construction which is not likely to wear out or to get out of order in ordinary use.

Another object of the invention is to provide means for prevent-ing the drill from injuring` a last while the drill is oilierating` through a p :feration in the last while at the 2, 1925. Serial No. 54,94

saine time insuring that the hole will be bored in the heel in coaxial relation with the hole in the last so that when the screw fastener is subsequently inserted through the last and into the heel it will not have any tendency to displace the heel from its proper position upon the heel seat of the shoe.

'lo the accomplishment of this object, the illustrated drill is partially enclosed within a cylindrical sleeve or bushingY which is rigidly secured to a non-rotatable handle in which the drill shaft is journaled. This bushing is adapted to lit slidingly within the hole in the last and to maintain the drill coaxial with the hole in the last and thus accurately to predetermine the position of the hole in the heel. The bushing` also serves as a guard to prevent the cutting edges of the drill from engaging the sides of the perforation in the last, thus insuring' that the drill will not enlarge the perforation or otherwise damage the last. The bushing is further so arranged that its free extremity is adapted to engage the inside of the shoe bottom and thus to serve as a stop to limi the penetration of the drill into the heel so that a hele of predeyermined depth may be made in the heel,

A further feature of the invention cons' :ts in the provision of means for facilitatingr the lubrication of the universal joint driving;` connections between the drill shaft and the inotor shaft.

Other features of the invention, including means for facilitating the manipulation of the drill, will he apparent from the following description of the embodiment of the invention shown in the acc inpanying drawings, in which iig. l is a view partially in side elevation and partially in section of so much of the machine of the patent hereinbefore referred to as is necessary to illustrate the application tiereto of the present invention; y

Fig. 2 is a diagrammatic View illustrating the driving connections between the motor shaft and the shafts which drive the drill and fastener inserting tools;

Fig. 3 is a view partially in side elevation and partially in section of a portion of the apparatus shown. in Fixe'. l, illustrating' particularly the universal joint connections between the drill and motor shafts;

Fig. 4 isa view partially in front elevation and partially in section of the parts shown in Fig. 3;

Fig. 5 is a view partially in side elevation and paritally in section of parts associated with the drill shaft showing particularly the non-rotary bushing which surrounds the drill, and

Fig. 6 is a detail sectional view taken along the line 6 6 of Fig. 3.

Referring to the drawings, the illustrated apparatus, in common with that shown in Letters Patent No. 1,502,014, above referred to, comprises a table 10 and a standard 12. The table 1() is provided with means, ineluding a tread plate 14 and a clamp bar 16, for supporting a lasted shoe and holding a heel in place thereon during the operati-.on of drilling a fastener-receiving hole in the heel. rllhe standard 12 carries a drill 18 and a fastener inserting or driving tool 20, together with an electric motor 22 for driving said tools.

rlhe tread plate 14 is shaped to engage the tread faces of both the heel and the forepart of the sole of the shoe and it is mounted to permit longitudinal tilting adjustment of the shoe such as may be desirable to position the shoe most advantageously for the engagement of the clamp bar 16 with the last. To this end, a horizontal pivot pin 21 is iixedly carried by ears 23 depending' from the plate 14 and is mounted for rocking or tilting adjustment within the upper end of a post 24 carried by the table 10. rlhe tread plate 14 is normally held in substantially horizontal position by the action of a spring 26 seated in a socket within the post 24 and bearing against a flattened face on the underside of the pivot pin 21. A pin 28 which is slidable vertically within a post 30 rests upon a spring 32 which is confined within a socket beneath the pin, and the upper end of the pin engages the forward extremity of the tread plate 14 to assist in supporting the shoe. A set screw 34 carried by the post 30 and arranged to engage the pin 28 may be tightened to support the pin rigidly and consequently to hold the forward extremity of the tread plate firmly in shoe supporting position. For supporting the curved rear portion of a relatively high wood heel and locating the shoe lengthwise with respect to the tread plate 14, a meinber 36 is provided which is supported by the post 24 and` is vertically adjustable to adapt it for use in connection with heels of different shapes and heights. For use in connection with relatively low heels, an abutment 88 is slidably adjustable longitudin ally of the tread plate 14 and adapted to engage the breast ed ge of the heel to position the shoe lengthwise for the heel drilling operation. rlhe member 86 is adapted to be removed when the abutment 38 is used.

The clamp bar 16 is tiltably mounted upon a horizontal rod 40 carried by a pair of links 42 arranged at opposite sides of the tread plate 14. At their lower ends the links 42 are pivotally mounted upon arms 44 which in turn are pivotally connected with the post 30. A treadle rod 46 connects the links 42 with a treadle (not shown) which may be depressed to bring the clamp bar 16 into operative engagement with the shoe and which may be latched in operative position and released as described in the patent referred to.

It is sometimes desirable to insert a hand tool, such as a screw driver, in the eye at the upper end of the screw fastener' to lighten or loosen the latter while the shoe is clamped to the tread plate. ln order to insure that the links 42 shall not interfere with such an operation they are offset somewhat toward the forepart of the shoe at their upper ends as shown clearly in Fig. 1.

rlhe drill 18 is carried by a rigid two-part drill shaft comprisin g an upper section 56 and a sliding tubular lower section 58, the former being arranged to telescope within the latter so as to make the drill shaft extensible and contractible freely at the will of the operator. The upper section 56 of the drill shaft is connected by a universal joint, indicated by the general reference numeral 60, with a horizontal shaft 62 which is j ournaled within a bushing or bearing sleeve .71 rigidly secured to a head 66 surmounting the standard 12. As shown, the sleeve'71 projects forwardly from the head 66 and extends into a bearing 68. rJlhe bearing 68 is split at he rear end and is rigidly secured by means of a binding screw 69 to the projecting portion of the sleeve 7l. An arm 70 dependingfrom the bearing 68 carries an adjustable abutment 72 which bears against a portion of the head 66 at a point below the level of the shaft 62, this construction serving to brace the shaft 62 and insure adequate support for the drill 18'and the connections between the drill and the shaft. rllhe shaft 62 is driven from the armature shaft 74 of the motor 22 by means of gears 7 6 and 78 (Fig. 2) which are secured to the shafts 62 and 74, respectively, and which are connected by an intermediate idle pinion 80.

Driving connection between the relatively slidable upper and lower sections 56 and 58 of the drill shaft is afforded by means of a key 84 on the upper shaft section 56 which is arranged to slide freely Within a longitudinal slot 86 in the tubular lower shaft section 58 so that the drill may be raised or lowered at will without interfering with its continuous rotation. A tubular shield 88 secured to the lower shaft sections4 58 encloses the latter to prevent injury to the operator from accidental engagement with the key 84 or the slot of the rapidly rotating drill shaft.

rlllhe lower section 58 of the drill shaft is connected through a universal joint 90 with a drill shaft extension 92 which is journaled within a non-rotating cylindrical bearing in the form of a. holder or handle 94 to be grasped by the operator in using the drill and being movable freely in all directions to facilitate the insertion and removal of the drill.

As best shown in Fig. 5, the lower extremity of the drill shaft extension 92 is formed with an annular flange 96 arranged to engage an annular' shoulder 98 formed at the inner end of a counterbored recess 100 in the handle 94 to support the latter in assembled relation with the .shaft extension 92. At its lower end the drill shaft extension 92 is provided with a socket 102 to receive the upper extremity of the drill 18. To provide driving connection between the drill shaft and the drill, the side wall of the socket 102 is flattened to engage a correspondingly flattened face 104 on the drill. The flange 96 forms the upper ball-race and a collar 106 the lower ball-race of a ball bearing 108 which is interposed between the shoulder 98 and a collar 110 on 'the drill to receive the thrust of the drill when it is operating upon the heel. As shown, the collar 110 is rigidly secured to the drill by means of a set-screw 112.

To supportand guide the drill as well as to prevent the drill from enlarging the perforation in the last or otherwise damaging the last, a guide 116 is provided which surrounds the drill throughout the greater part of its length. T he guide 116 is arranged to remain stationary while the drill rotates, and to this end the guide is provided with an enlarged upper extremity 118 which is received within the recess 100 in the holder or handle 94 and is rigidly secured to the handle by means of set-screws 120. The diameter of the guide is such as 'to permit the latter to be freely inserted within the perforation in the last. The guide serves to protect the last from the cutting action of the drill, and inasmuch as the guide does not rotate, it has no tendency to enlarge the perforation. The guide terminates at such a distance from the lower extremity of the drill that the free end of the guide is adapted to engage the shoe bottom and serve as a stop to limit the distance which the drill is permitted to penetrate the heel. This construction insures that the hole will be made the right depth in the heel irrespective of variations in the height of the last. As shown, the guide 116 is provided with an elongated, longitudinal slot 122 for permitting the escape of the chips produced by the drill.

To provide means for support-ing the drill when the lat-ter is not in use, a hook 126 carried by the upper portion of the drill handle 94 is adapted to engage a rectangular stud 128 carried by the standard 12. As shown, the hook 126 conforms to the cross-sectional shape of the rectangular stud 128 to insure against accidental displacement of the handle 94. rlhe handle-supporting stud 128 is adjustable both horizontally and vertically to vary the elevation of the drill when the latter is supported in inoperative position so that all lost motion on the part of the operator in reaching for the drill may be avoided. To this end, the stud 128 is carried by a rod 130 which is horizontally adjustable in a bracket 132 and the latter, in turn, is carried by a rod 134 which is vertically adjustable within a bracket 136 carried by the standard 12. Suitable set-screws 138 and 140 in the brackets 132 and 136, respectively, enable the stud 128 to be rigidly secured in various positions of horizontal and vert-ical adjustment. ln addition to the horizontal and vertical adjustments of the stud 128 just described, the latter may be tiltably adjusted about the axis of the vertical rod 134. The various adjustments of the handle-supporting block 128 enable the drill handle to be so located when inoperative that it may most conveniently be grasped and moved into operative position.

The universal joint 60 which connects the drill shaft with the shaft 62 comprises outer and inner bearing members 146 and 148. The members 146 and 148 are adapted to swing about axes which are disposed at right angles to each other. The upper section 56 of the drill shaft is journaled in the outer bearing member 146 and said bearing member is supported by and adapted to swing about a shaft 150 which is arranged at right angles to the horizontal shaft 62. The inner bearing member 148 supports the shaft 150 and is adapted to swing about the horizontal shaft 62. To this end the inner bearing member 148 is formed with an integral sleeve 151 which surrounds the shaft 62 and is ournaled within the bearing 68. As shown in Fig. 3, the sleeve 151 is provided with an exterior flat face 153 arranged to be engaged by a stop screw 155 to limit the swinging movement of the member 148 in either direction.

Driving connections between the horizontal shaft 62 and the upper section 56 of the drill shaft comprise a bevel pinion 152 secured to the forward extremity of the shaft 62, an intermediate bevel gear 154 secured to the shaft 150 and a bevel pinion 156 secured to the upper end of the drill shaft section 56.

In order to provide for adequate lubrication of the driving gears 152, 154 and 156, the upper portion of the swinging bearing member 146 is enlarged and made in the form of a cylindrical casing or reservoir 160 adapted to contain a supply of oil within which the gears 154 and 156 are adapted to run. To prevent leakage of oil between the drill shaft section 56 and the bearing member 146 a suitable stuiing box 162 is provided at the lower extremity of the bearing member 146. The inner bearing member 148 comprises a housing 164 which is partially contained and adapted to swing freely within the oil reservoir 160 and carries the sleeve 151 which is mounted to turn in the bearing 68. The housing 164 is provided with an opening 166 at its lower portion, said opening 166 being large enough to permit the passage therethrough of the upper section of the drill shaft as well as to provide for communication between the housing 164 and the oil reservoir 160 so that the same level of oil may be maintained within the housing as within the reservoir. The opening 166 is of such width as not to interfere with the necessary swinging movement of the bearing member 146 which constitutes one portion of the universal joint 60. rlhe housing 164 is closed at the top and sides to insure that the turning of the gears therein will not result in splashing oil outside of the housing to the possible damage of the shoes being operated upon. Conveniently, the upper portion of the housing 148 is made in the form of a removable cover 168 and a screw plug 170 is provided in the cover, the plug being removable to permit replenishment of the supply of oil in the reservoir 160.

A similar plug 17 2 in the side of the oil reservoir may be removed to permit drainage of the reservoir. As shown, the cylindrical side wall of the reservoir 160 is cut away, as shown at 174, to permit the passage of the shaft 62. To prevent possible escape of oil through the cut-away portion 174 a segmental shoe 17 6 of felt or similar material, secured to the outer side of the oil reservoir and surrounding the cut-away portion 174, is adapted slidingly to engage the adjacent end of the bearing 68 as the drill is moved angularly, so that leakage of oil is effectively prevented.

As shown in Fig. 4, the shaft 150 which carries the gear 154 and about which the bearing` member 146 is adap ed to swing is journalec within bearing sleeves 180 which are rigidly secured by means of set screws 182 i hin openings at opp` site sides of the oil reservoir 160 and a collar 1.83 secured to the shaft 150 engages the inner side wall of the housing 164 to prevent endwise displacement of the shaft. @utward leakage of oil around the shaft 150 is prevented by means of plugs 184 which close the outer ends of the bearings within the sleeves 180.

lhe fastener inserting tool 20 is carried by a two-part extensible shaft 190 connected by a universal joint 192 with a vertical shaft 194 for swinging movement in all directions relatively to the latter shaft. IThe shaft 194 is journalcd within a housing 196 carried at the forward end of a sleeve 198 which projects forwardly from the head 66, and provides a bearing for a horizontal shaft 200. The shaft 200 is driven from the motor shaft 74 by means of a r 202 the teeth of which intermesh with those of the gear 78 on the motor shaft. Driving connections betwen the horizontal shaft 200 and the vertical shaft 194 are afforded by means of intermeshing bevel gears 204 within the housing 196 which are secured to said shafts, respectively. rIhe construction of the fastener inserting tool 20, as well as the above-described connections between said tool and the motor shaft, are the same as set forth in detail in Letters Patent No. 1,664,657, granted April 3, 1928, upon my application. As shown in F ig. 1, a shield 205 has been provided for preventing the hand of the operator from accidentally coming in contact with the rapidly rotating shaft 190. rlhe shield 205 comprises two sleeves attached, one to the upper and the other to the lower sections of the extensible shaft 190, and arranged to telescope one within the other to permit lengthening and shortening of said shaft. A guard plate 206, depending from the housing` 196, serves to prevent the operators head from engaging either of the tool shafts. Y

The fastener driving tool 20 is held out of 'the way when it is not in use by means of a post 208 provided with a spherical head 210 which is freely rotatable upon the post and is adapted to tit within the spherical recess in the fastener driving tool. To avoid loss of time, it is desirable that the fastener driving tool, when not in use, shall be supported in such a position that the operator may conveniently grasp the tool without making any unnecessary movements. To this end the pest 208 is so mounted as to provide for a considerable range of adjustment of its position. As shown, the post 208 is adjustably secured, by means of a set screw 212, with provision for vertical adjustment within a bracket 214, and said bracket is carried by a rod 216 which, in turn, is mounted for horizontal adjustment in a bracket 218 and is adapted to be secured in adjusted position within the bracket by means of a set screw 220. rlhe bracket 218 is supported by a post 222 carried by the table 10. ln addition to the vertical and horizontai movements of the post 208, the latter is adapted to be swung bodily about the axis of the post 222 and may be secured in angularly adj usted position by means of a set screw 224.

rllhe novel features of the work supporting and clamping mechanism herein disclosed are not claimed herein, but are claimed in my copending application Serial No. 127,034, filed August 4, 1926, as a continuation in part of the present case. f

flavie g thus described my invention, what l claim as new and desire to secure by Letters Patent of the United States is z- 1. A machine for drilling downward through a deep hole in a last into a shoe and heel clamped to the last, said machine comprising an elevated, horizontaldriving shaft, a rigid, telescopic, pendent, driven shaft universally movable about a point in the axis of the driving shaft, driving connections between said shafts, a universal joint at the lower extremity of the driven shaft, and a pendent drill holder supported by said universal joint.

2. A machine for drilling downward through a deep hole in a last into a shoe and heel clamped to the last, said machine comprising an elevated, horizontal driving shaft, a rigid, longitudinally extensible, pendent, driven shaft, gearing connecting the driving shaft, with the upper extremity of the driven shaft, a universal oint at `the lower extremity of the driven shaft, a pendent drill holder supported by said universal joint, and a supporting bearing for the pendent driven shaft, said bearing being universally movable about a point in the axis of the driving shaft.

3. A machine for drilling downward through a deep hole in a last into a shoe and heel clamped to the last, said machine comprising an elevated, horizontal, driving shaft, a bevel driving gear on said shaft, an intermediate shaft, a bevel gear on the intermediate shaft meshing with the driving gear, a pendent, extensible drill shaft, a bevel gear on the drill shaft meshing with the intermediate gear, an inner housing mounted to tilt about the axis of the driving shaft, said housing supportingfthe intermediate shaft and enclosing all of the gears, an oil tight outer housing surrounding the inner housing, said outer housing being supported by the intermediate shaft, being capable of tilting about the axis of the intermediate shaftand supporting the drill shaft, a universal joint at the lower extremity of the drill shaft, and

a pendent drill holder supported by the universal joint.

4:. A machine for drilling downward through a deep hole in a last into a shoe and heel clamped to the last, said machine comprising an elevated driving mechanism, a pendent, extensible drill shaft connected to said driving mechanism, a. pendent drill at the lower end of the drill shaft, a nonrotatable handle Within which the drill rotates and from which the drill projects a fixed distance, and an elongated cylindrical drill guide fixed in the handle and surrounding the drill, the outside of said guide being of a diameter to fit said hole in the last and being longer than the height of the last, and the drill projecting below the lower end of the guide a fixed distance exactly equal to the depth of the hole to be drilled in the shoe and heel.

5. A machine for drilling downward through a deep hole in a last into a shoe and heel clamped to the last, said machine comprising a motor, a pendent, extensible shaft driven by the motor, a handle within which the lower extremity of said shaft is journaled, a drill connected to rotate with said shaft, a bearing for the drill within the handle, a collar rigidly secured to the drill, a shoulder formed within the handle, and a thrust bearing between the collar and said shoulder, said collar and thrust bearing being entirely enclosed within the handle.

ln testimony whereof I have signed my name to this specification.

FREDERIC E. BERTRAND. 

